Railway Sleepers

Sleepers, also known as railroad sleepers or road sleepers, are a component of railway tracks. They are directly attached to the bottom of the rails and stabilize the rails, preventing them from shifting and causing danger when passing trains. They also distribute the pressure generated by passing trains evenly across the ballast, ensuring more stable train travel.

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Description

Technical Parameters

Railway Concrete Sleeper Application

Category	Specification	Standard/Reference
Mechanical Properties	- Flexural strength: ≥7MPa - Fatigue life: >50M cycles - Rail seat load: ≥250kN	EN 13230-2, AREMA Ch.30
Fastening Systems	- Nabla/SKL clips (EN 13481-5) - Pandrol e-clip (AREMA Class 5) - Shouldered bolts (UIC 865)	UIC 864, EN 13450
Installation	- Ballast depth: 300-350mm - Sleeper spacing: 600-700mm - Tamping frequency: Initial + 3 passes	AREMA Ch.1, EN 13450
Maintenance	- Crack inspection: Every 2 years (UT/visual) - Replacement criteria: • Crack width >0.3mm • Rail seat abrasion >5mm	EN 13230-3, UIC 713R